Question

from the sum of x² - y² - xy and 3x² - 2y² + 7 subtract 2x² + 2y² + 7x²y - 3xy²​

Answer 1

Answer:

Sum of 3x2 - 2x and 3x + 7

= (3x2 - 2x) + ( 3x +7)

= 3x2 - 2x + 3x + 7

= (3x2 + x + 7)

Now, required expression = (2x2 - 3x + 1) + (3x2 + x + 7)

= 2x2 + 3x2 - 3x + x + 1 + 7

= 5x2 - 2x + 8

Answer 2

Step-by-step explanation:

x^2 - y^2 - xy + 3x^2 - 2y^2 + 7 - 2x^2 +2y^2 + 7x^2y - 3xy^2

= 4x^2 - 3y^2 - xy + 7 - 2x^2 + 2y^2 + 7x^2y - 3xy^2

= 2x^2 - y^2 - xy + 7 + 7x^2y - 3xy^2